Alzheimer’s disease affects over 5.5 million Americans and is the most common memory disorder worldwide. But despite all the attention it receives, no effective treatment has been found – until now. Researchers led by Dr. Malcolm Leissring, a neuroscientist at Mayo Clinic in Fla., recently discovered an enzyme – dubbed BACE 2 – that cuts beta-amyloid, effectively destroying the toxic protein prevalent in patients struggling with Alzheimer’s.